In a mixing bowl, combine the shredded chicken, softened cream cheese, shredded cheddar cheese, ranch dressing, and spicy buffalo sauce. Mix until well combined.

Transfer the mixture to a Crock Pot and heat on low for 2-3 hours or until bubbly and hot, stirring occasionally. Alternatively, you can bake it in a preheated oven at 350°F (175°C) for about 20-25 minutes until golden and bubbly.

If using, sprinkle blue cheese crumbles on top before serving.

Serve hot with tortilla chips, celery stalks, or your favorite dippable snacks.